Class ReplaceMissingValues
- java.lang.Object
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- weka.filters.Filter
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- weka.filters.unsupervised.attribute.PotentialClassIgnorer
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- weka.filters.unsupervised.attribute.ReplaceMissingValues
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- All Implemented Interfaces:
java.io.Serializable
,CapabilitiesHandler
,OptionHandler
,RevisionHandler
,Sourcable
,UnsupervisedFilter
public class ReplaceMissingValues extends PotentialClassIgnorer implements UnsupervisedFilter, Sourcable
Replaces all missing values for nominal and numeric attributes in a dataset with the modes and means from the training data. Valid options are:-unset-class-temporarily Unsets the class index temporarily before the filter is applied to the data. (default: no)
- Version:
- $Revision: 5547 $
- Author:
- Eibe Frank (eibe@cs.waikato.ac.nz)
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description ReplaceMissingValues()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
batchFinished()
Signify that this batch of input to the filter is finished.Capabilities
getCapabilities()
Returns the Capabilities of this filter.java.lang.String
getRevision()
Returns the revision string.java.lang.String
globalInfo()
Returns a string describing this filterboolean
input(Instance instance)
Input an instance for filtering.static void
main(java.lang.String[] argv)
Main method for testing this class.boolean
setInputFormat(Instances instanceInfo)
Sets the format of the input instances.java.lang.String
toSource(java.lang.String className, Instances data)
Returns a string that describes the filter as source.-
Methods inherited from class weka.filters.unsupervised.attribute.PotentialClassIgnorer
getIgnoreClass, getOptions, getOutputFormat, ignoreClassTipText, listOptions, setIgnoreClass, setOptions
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Methods inherited from class weka.filters.Filter
batchFilterFile, filterFile, getCapabilities, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper
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Method Detail
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globalInfo
public java.lang.String globalInfo()
Returns a string describing this filter- Returns:
- a description of the filter suitable for displaying in the explorer/experimenter gui
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getCapabilities
public Capabilities getCapabilities()
Returns the Capabilities of this filter.- Specified by:
getCapabilities
in interfaceCapabilitiesHandler
- Overrides:
getCapabilities
in classFilter
- Returns:
- the capabilities of this object
- See Also:
Capabilities
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setInputFormat
public boolean setInputFormat(Instances instanceInfo) throws java.lang.Exception
Sets the format of the input instances.- Overrides:
setInputFormat
in classPotentialClassIgnorer
- Parameters:
instanceInfo
- an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).- Returns:
- true if the outputFormat may be collected immediately
- Throws:
java.lang.Exception
- if the input format can't be set successfully
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input
public boolean input(Instance instance)
Input an instance for filtering. Filter requires all training instances be read before producing output.
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batchFinished
public boolean batchFinished()
Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances.- Overrides:
batchFinished
in classFilter
- Returns:
- true if there are instances pending output
- Throws:
java.lang.IllegalStateException
- if no input structure has been defined
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toSource
public java.lang.String toSource(java.lang.String className, Instances data) throws java.lang.Exception
Returns a string that describes the filter as source. The filter will be contained in a class with the given name (there may be auxiliary classes), and will contain two methods with these signatures:
where the array// converts one row public static Object[] filter(Object[] i); // converts a full dataset (first dimension is row index) public static Object[][] filter(Object[][] i);
i
contains elements that are either Double, String, with missing values represented as null. The generated code is public domain and comes with no warranty.
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Overrides:
getRevision
in classFilter
- Returns:
- the revision
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main
public static void main(java.lang.String[] argv)
Main method for testing this class.- Parameters:
argv
- should contain arguments to the filter: use -h for help
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